Activators for two part cyanoacrylate adhesives

Abstract

There is provided a cyanoacrylate composition comprising: a cyanoacrylate; and a 2-substituted benzothiazole or a derivative thereof wherein the 2-substituent is an alkyl, an alkene, an alkylbenzyl, an alkylamino, an alkoxy, an alkylhydroxy, an ether, a sulfenamide, a thioalkyl or a thioalkoxy group, with the proviso that an amide portion of the sulfenamide does not have a tert butylamino or a morpholine group.

The invention claimed is: 
     
       1. A two-part cyanoacrylate adhesive composition comprising:
 Part A: a cyanoacrylate; and 
 Part B: 
 (a) a 2-substituted benzothiazole, and 
 (b) a plasticizer selected from the group consisting of triacetin, dioctyl phthalate, dibutyl phthalate, trioctyl trimellitate, dioctyl adipate, dioctyl glutarate, butyl cyanoacetate, trimethyl trimellitate, diethylene glycol dibenzoate, diethyl malonate, triethyl-O-acetyl citrate, benzylbutyl phthalate, dipropylene glycol dibenzoate, diethyl adipate, tributyl-O-acetyl citrate, dimethyl sebacate, tributyl-O-acetyl citrate, triethyl-O-acetyl citrate, dipropylene glycol dibenzoate, diethylene glycol dibenzoate, benzylbutyl phthalate, dibutyl adipate, dibutyl sebacate, dicapryl adipate, dicapryl phthalate, diethyleneglycol dibenzoate, diethyl adipate, diethyl glutarate, diethyl malonate, diethyl pimelate, diisononyl phthalate, dimethyl adipate, dimethyl glutarate, dimethyl sebacate, dioctyl phthalate, diprophyleneglycol dibenzoate, ethyl caproate, glyceroltrioleate, isopropyl myristate, methyl laurate, methyl stearate, pentaerythritol tetraacrylate, pentaerythriotoltetrabenzoate, poly(neopentyl glycoladipate), tributyl-O-acetyl citrate, tricapryl trimellithate, triethyl-O-acetyl citrate, trihexyl trimellithate, tris(isopropyl phenyl)phosphate, trimethyl trimellithate, trioctyl trimellithate, and combinations thereof, wherein the 2-substituted benzothiazole is selected from the group consisting of: 
 
       
         
           
           
               
               
           
         
       
     
     
       2. A cyanoacrylate composition according to  claim 1 , wherein Part A and Part B are present in a 10:1 by volume ratio and packaged in a dispensing pack such that Part A and Part B are separated. 
     
     
       3. A cyanoacrylate composition according to  claim 2 , wherein the dispensing pack is a dual barrel chamber syringe.